| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 321.1 | No slot restrictions on DECbrouter 90 | NAC::FORREST | | Tue Aug 03 1993 16:41 | 9 |
|
Newer DECbridge 90s will go into Flood mode when the station count
exceeds 200. You can also disable the bridging on the DECbrouter
if its not needed.
If you know you're going to have a lot more than 200 nodes in
the configuration, and you have to have the DECbrouters do
bridging, then you should probably go with a LANbridge 200.
|
| 321.2 | | TMAWKO::PRESSLEY | pin heads are people too... | Thu Aug 05 1993 17:23 | 4 |
| In this scenerio, if the brouters are indeed set to bridge then aren't you
violating the end node bridge rule of the DB90? If this is the case and
you are using a DB90 which supports flood mode then once you install a
brouter into the hub does the db90 essentially become a repeater?
|
| 321.3 | DB90->LB200 if BRUT=Bridging | HGOVC::GUPTA | | Thu Aug 05 1993 22:28 | 11 |
| I will replace DECbridge 90 with LANbridge 200 in case the customer
insists that BRUT should bridge too.
At the moment, I am using BRUTs only for routing on T1/E1 lines and I
will write this very clearly in the proposal as well.
The point that comes out very clearly from this note is that I can fill
the whole DEChub 90 with BRUTs.
Regards,
Surender
|
| 321.4 | DECbridge 90 in flood mode is not a repeater | NAC::FORREST | | Mon Aug 09 1993 13:40 | 7 |
|
re .2:
Even in flood mode, the DECbridge 90 will still separate collision
domains. It will also filter out the runt packets, the too long
packets, framing errors, etc. In a number of ways, it is much better
than having a repeater.
|
| 321.5 | End node bridges | TMAWKO::PRESSLEY | pin heads are people too... | Wed Aug 11 1993 07:58 | 5 |
| Is it safe to say then that once a second bridge is inserted into the
hub where the first bridge is a decbridge 90 that the decbridge 90 will
go into flood mode since it is an end node bridge?
Is the decbrouter 90 also an end node bridge?
|
| 321.6 | DB90=End node;BRUT=no | HGOV08::GUPTA | | Wed Aug 11 1993 23:26 | 18 |
| Reply .5
I think we need to discuss DECbridge 90 as one unit and not in any way
connected to other modules in the hub. All this discussion about DB90
is becuase of the limited size of the Forwarding Database (200
stations). For this reason, DB 90 is not a backbone bridge (bridging
two backbones). Moreover, ONLY ONE DB90 is supported inside a hub (8/16
slot) for so many hardware/software reasons.
DB90 will enter into Flood Mode (if enabled) only when 200 stations
limit is exceeded. This has nothing to do with the presence or
otherwise of BRUTs.
I am not sure about the similar limitations about BRUTs when it is
configured for bridging functions. Can anyone help on this point ?
Regards,
Surender
|
| 321.7 | Definitive statement please.... | SAC::LANG_H | | Mon Dec 13 1993 05:29 | 14 |
| Re .3
Can I ask for clarification that the point stated in .3 stands; ie:-
#The point that comes out very clearly from this note is that I can fill
#the whole DEChub 90 with BRUTs.
I am looking at a configuration which will require 4 Brouter 90s T2 in
the same hub. Is this supported ?
Thanks
Harvey
|
| 321.8 | no limit on DEWBR | QUIVER::SLAWRENCE | | Mon Dec 13 1993 09:11 | 3 |
| You can get specific support on the DECbrouter in KALI::DEWBR
I believe there is no limit on the number you can put in a hub.
|
| 321.9 | I thought the limit was 8. 8^) 8^) | CGOS01::DMARLOWE | dsk dsk dsk (tsk tsk tsk) | Mon Dec 13 1993 13:28 | 2 |
| re. I believe there is no limit .....
|